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(No Mode'L) A. P. THAYER.

METHOD OF MAKING METAL FENCE BARBS;

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ANSON P. THAYEB, OF BROOKLYN, NEW YORK, ASSIGNOR TO THOMAS W.

HALL, OF SAME PLACE.

METHOD 'OF MAKING TEFPBCIFICATIQN forming part of Letters Patent No.315,084, dated April '7, 1885.

Application liled November 30, 1883. (No model.)

To all whom it may concern:

Be it known that I, Anson P. THAYER, a citizen of the United States,residing at Brooklyn, in the county of Kings and State of New York, haveinvented a new and useful Improved Method of Making Barbed .MetallicFencing, of which the following is a specification.

This invention relates to an improved method of separating a doubleblank strip and forming barbs on the rods produced therefrom by means ofdies, the said strip consisting of two parallel cores and aconnecting-web,whioh strip is to be sheared apart along the web, andpart of the web is to be cut away in waste pieces to form the barbs.

The method of operation consists of, first, punching out the wasteportions of the web to be removed from between the barbs and formingdiagonal cross-bars of the remaining portions which are to constitutethe barbs; and, second, shearing said cross-webs apart diagonally, andthereby completing the barbs, and also completing-the separation of thestrips.

\ The dies consist of punches which first punch out waste portions ofthe web and partly separate the blank strip, leaving cross-webs for thebarbs, and shearing-dies which separate the cross-webs diagonally, andform two barbs out of each cross-web, and at the same time complete theseparation of the blank strip, as hereinafter described, reference beingmade to the accompanying drawings, in which Figure l is a cross-sectionof the blank strip to be separated and barbed. Fig. 2 is a plan view ofthe bed-die, and horizontal section of punches for punching out thewaste pieces; also a diagram of the horizontal form of shearing-dies forshearing the cross-webs or barbwebs apart, and also a plan of a portionof a blank strip being cut. Fig. 3 is a side elevation of the devicesrepresented in Fig. 2. Fig. 4 is a plan of the bed-die and a portion ofthe strip, also a horizontal section of punches of a modified form forpunching out the waste material from between the barbs and for partlyseparating the blank strip. Fig. '5 is a side elevation of the punches,die, and blank strip represented in Fig. 4. Fig. 6 is a plan view of thebed-die and horizontal section of the movable die to be used inconnection with the punches of Figs. 4 and 5, for shearing apart thecross-webs and completing the barbs and the separation of the strip.with a portion of the strip between the dies, as when being separated bythem; and Fig. 7 is a side elevation of the dies of Fig. 6 and the blankstrip thereon.

First, I propose to punch out the waste material, as at a or a, so as toleave diagonal cross-webs d, to form the barbs 0, using ordinarypunches, b, and dies 0, which may either have parallel diagonal edges 0,as in Figs. 2 and 3, or converse diagonal edges 6, as in Figs. 4 and 5;and I then shear apartthe diagonal cross-webs diagonally across them, asindicated by the dotted lines f, which completes the separation of thestrips, and also completes the barbs.

For shearing the cross-webs apart I use a bed-die, g, and acorresponding movable die, z, having one or more diagonal cutting-edges,h, when the punches and dies having parallel edges are used to punch outthe waste; but when the punches and dies of Figs. 4 and 5 are used Iemploy a beddie, g, and movable die 6, having two or more diagonalcuttingedges, h. In the first arrangement of punches, having paralleldiagonal edges, e, the crosswebs d left between the waste portionspunched out all incline in the same direction, and are ployed forpunching'out all the waste pieces in succession, also shearing-dieshaving only one pair of cutting-edges, h but the punches and theshearing-cutters may be increased in number at will. But with thearrangement of punches having converse inclined edges 0, Fig. 4, twopunches and dies, arranged conversely as to the edges e, have to beused, which makes the cross-webs alternately converse to each other, andthe shearing-dies g and 11 must have two converse cutters, h, tocorrespond with'the converse inclinations of the said cross- Webs. Thesepunches and shearing-diesmay be increased in number by twos, as desired,

shearing-dies maybe arranged in one press so that the strips to be cutwill be punched and parallel, and one punch and die may be emand in botharrangements the punches and I separated at once; or the punches anddies of both arrangements may be mounted and Worked separately.

With the punches and dies of Fig. 2 the barbs will all be formed thesame distance apart; but with the arrangement of Fig.4 the barbs will bedifferent distances apart alternately. When only one punch and one pairof shearing-dies are used, the strips will be fed only the distance ofone barb from another apart; but as the number of punches and dies isincreased the length of the feed movements will be correspondinglyincreased.

The blank strip to be cut and barbed consists of the two parallel cores9', connectingweb is, and the outer thin edges, Z.

The herein described improvements in dies constitute the subject-matterof aseparate application for a patent.

' ANSON r. THAYER.

Witnesses:

F. A. THAYER, S. H. MORGAN.

